r = 12 sin 18ti + 12 cos 18tj

Algebra & Trigonometry with Analytic Geometry
13th Edition
ISBN:9781133382119
Author:Swokowski
Publisher:Swokowski
Chapter11: Topics From Analytic Geometry
Section11.4: Plane Curves And Parametric Equations
Problem 13E
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Describe the graph of the equation.
r = 12 sin 18ti + 12 cos 18tj
O It is a circle of radius 18 in the xy-plane, with center at the origin.
O It is a circle of radius 12 in the xy-plane, with center at the origin.
O It is a circle of radius 12 in the xy-plane, with center at (18, 18).
O It is a parabola in the xy-plane, with vertex at the origin.
O It is an ellipse in the xy-plane, centered at the origin, with major axis of length 12.
Transcribed Image Text:Describe the graph of the equation. r = 12 sin 18ti + 12 cos 18tj O It is a circle of radius 18 in the xy-plane, with center at the origin. O It is a circle of radius 12 in the xy-plane, with center at the origin. O It is a circle of radius 12 in the xy-plane, with center at (18, 18). O It is a parabola in the xy-plane, with vertex at the origin. O It is an ellipse in the xy-plane, centered at the origin, with major axis of length 12.
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